Wow, a great gig! Passing your knowledge to the next generation is one of the most rewarding things a person can do.

FWIW, I train the next generation of police officers, as what is generically known as an FTO. Some of the recent ones are younger than my grown son, but not, of course, as young as the ones in your MTB class. I also taught American Red Cross-sanctioned swimming lessons back in my younger days, both paid and volunteer, which is closer to what you are doing. Enjoy!